The markdown span builders are context-free statics, so they pinned the
bundled clideUiFamily const and ignored the Appearance UI-font setting —
Claude's conversation prose stayed on the default face regardless of the
pick. Thread the resolved UI family through the same ClideMarkdownHooks
carrier already used for mono (T-472): build() resolves it from context and
every prose/link span reads hooks.ui. Adds a regression test asserting prose
and inline code follow the families from the ClideSettingsScope.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>